if (navigator.userAgent.indexOf("Win") >= 0) {
	if (vercheck(1,0)) {
		document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="./css/win_ie.css">');
	} else {
			document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="./css/win_nn.css">');
	}
} else {
	document.write('<LINK REL="stylesheet" TYPE="text/css" HREF="./css//mac.css">');
}

function vercheck(IEversion,NNversion) {
	if ((navigator.appName.indexOf("Microsoft") >= 0)&&(IEversion != 0)&&(IEversion <= parseFloat(navigator.appVersion))) {
		return true;
	} else {
		if ((navigator.appName.indexOf("Netscape") >= 0)&&(NNversion != 0)&&(NNversion <= parseFloat(navigator.appVersion))) {
			return true;
		} else {
			return false;
		}
	}
}